Refactor: remove key parameter from testvar methods (#7040) #8312

Job	Run time
Pre-build for cache	2m 30s
Set up single test	15s
Integration test	1m 55s
Unit test	3m 37s
Functional test ndc (cass_es)	3m 55s
Functional test ndc (cass_es8)	3m 36s
Functional test (ubuntu-20.04, 0, cass_es)	13m 26s
Functional test xdc (cass_es)	17m 38s
Functional test ndc (mysql8)	3m 34s
Misc checks	5m 52s
Functional test (ubuntu-20.04, 0, cass_es8)	14m 17s
Functional test xdc (cass_es8)	19m 10s
Functional test ndc (postgres12)	3m 9s
Functional test (ubuntu-20.04, 0, sqlite)	12m 28s
Functional test ndc (postgres12_pgx)	3m 19s
Functional test xdc (mysql8)	18m 15s
Functional test (ubuntu-20.04, 0, mysql8)	13m 39s
Functional test xdc (postgres12)	19m 5s
Functional test (ubuntu-20.04, 0, postgres12)	13m 21s
Functional test xdc (postgres12_pgx)	18m 4s
Functional test (ubuntu-20.04, 0, postgres12_pgx)	11m 39s
Functional test (ubuntu-20.04, 1, cass_es)	14m 37s
Functional test (ubuntu-20.04, 1, cass_es8)	16m 24s
Functional test (ubuntu-20.04, 1, sqlite)	12m 41s
Functional test (ubuntu-20.04, 1, mysql8)	13m 22s
Functional test (ubuntu-20.04, 1, postgres12)	12m 57s
Functional test (ubuntu-20.04, 1, postgres12_pgx)	13m 49s
Functional test (ubuntu-20.04, 2, cass_es)	12m 37s
Functional test (ubuntu-20.04, 2, cass_es8)	13m 43s
Functional test (ubuntu-20.04, 2, sqlite)	12m 24s
Functional test (ubuntu-20.04, 2, mysql8)	11m 41s
Functional test (ubuntu-20.04, 2, postgres12)	11m 23s
Functional test (ubuntu-20.04, 2, postgres12_pgx)	12m 54s
Test Status	1s
	6h 1m 17s

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